http://api.tweetmeme.com/imagebutton.gif?url=http://espn.go.com/new-york/nba/story/_/id/8164374/source-jeremy-lin-signs-three-year-offer-sheet-houston-rockets (http://api.tweetmeme.com/share?url=http://espn.go.com/new-york/nba/story/_/id/8164374/source-jeremy-lin-signs-three-year-offer-sheet-houston-rockets&service=bit.ly&source=espn)Jeremy Lin has signed a three-year offer sheet with the Houston Rockets, according to a source close to the talks.